JPS5927733Y2 - Combine waste straw cutting device - Google Patents

Description

[Detailed description of the invention] This invention is a waste straw cutting device that cuts the waste straw after threshing in a combine harvester that cuts the planted husk while traveling in the field and threshes the harvested husk culm. It is related to

For example, if all of the waste straw from a field is returned and supplied to the field in a shredded state, the amount of reduced straw will be excessive. Although it has been conventionally possible to switch between a non-active state and a non-active state, the structure for slidingly displacing the heavy waste straw cutting device between a cutting position and a standby position requires a robust structure. Requires a rail mechanism, making the structure complex.

For this reason, conventionally, a structure has been generally adopted in which a part of the cutting part, for example, one cutter shaft and the cutter on it, is supported so as to be rotatable between a cutting position and a standby position. In this structure, the relative positions of the cutting parts that cooperate with each other to cut the waste straw often change with use, making it difficult to expect reliable straw cutting over a long period of time.

In a structure that rotates the scraped cut part, the rotation locus is circular, so it is practically impossible to provide a rail to guide the cut part between the cutting position and the standby position, and it is difficult to rotate the cut part. It is necessary to set the rotational displacement locus so that the cutting part that is dynamically displaced does not interfere with the straw removal chain, etc., and the waiting position of the cutting part should be set, for example, below the straw removal chain, so that the cutting mechanism protrudes as much as possible to the rear of the machine. This makes it impossible to store it compactly.

Therefore, this invention is a new combine harvester that solves the above-mentioned problems by having a structure in which the entire cutting part is slidably displaced between the cutting position and the standby position by the rotational displacement of the support member. waste straw cutting device,
This is what we are trying to provide.

The structure of the waste straw cutting device for a combine harvester according to the present invention will be explained with reference to the illustrated embodiment. The device is installed in the direction of the unloading terminal of this straw removal chain 1, and has a plurality of disc-shaped cutting blades 3 provided at intervals on a cutter shaft 2, and a number of disc-shaped cutting blades 3 provided at intervals on another cutter shaft 4. The disc cutter includes a guide blade 5 provided therein.

The above-mentioned double-loaded cane shafts 2 and 4 are rotatably supported by ball bearings 6.7 at both ends thereof, but these ball bearings 6.7 are particularly fixedly supported by left and right bearings 8. Let it be.

That is, as shown in FIG. 1, each bearing metal 8 has semicircular support bodies 8a, 8b that receive ball bearings 6.7 from below.
are formed, and the semicircular support cylinders 9, 10 are fixed on the semicircular support cylinders 8a, 8b by fixtures 11.12, so that the ball bearing 6.1 is held between them. That's what I'm doing.

13A in FIG. 13B is an outer shaft portion 2b that is screwed onto the ends of the square shaft portions 2a and 4a of the cutter shafts 2 and 4 to support the blades 3 and 5;

This is a pair of nuts for tightening 4b.

The left and right bearings 8 are connected to each other by a connecting frame 14 (FIGS. 1 and 3) that connects the front ends of the bearings 8.

A pair of left and right rotating arms 17 are provided, rotatably supported by a support frame 15 attached to the rear end of the combine machine, about a horizontal support shaft 16t. It is connected to the right and left bearings 8 by pins 18 so that the bearings 8 can be moved back and forth by the rotational displacement of the rotating arm 17.

As shown in FIG. 4, the cutter is driven by a drive pulley 19 on the machine body side and a cutter pulley 20 on the cutter shaft 2.
As shown in FIG. 2, the large diameter gear 24 on the cutter shaft 4 is meshed with the small diameter gear 25 on the cutter shaft 2. The cutter pulley 20 is interlocked and connected to the double-handed pivot shafts 2 and 4.

In the figure, 26 is a gear case that accommodates the gears 24 and 25 described above, and this gear case 26 is fixed on the exceptional surface of the -11J bearing metal 8.

Considering the above configuration, when the rotating arm 17 is rotationally displaced between the position shown by the solid line and the position shown by the imaginary line in FIG. 6.7. The cutter shafts 2 and 4, the blades 3 and 5, the gear case 26, the gears 24 and 25, and the cutter pulley 20 are integrally rotated back and forth, as shown in Figs. A pair of left and right rails 28 are provided which are fixed to the machine body and which are fixed to a cutter case 27 which houses the above-mentioned cutting parts 2-7, 20, 24, 25, and 26, and which are slightly inclined backward and downward. The left and right bearing metal 8
A roller 30 having a shaft 30a supported by an arm 29 protruding from the upper surface of the front end is supported by the rail 28, so that the displacement of the entire cutting part is guided and regulated.

When the cutting blade 3 and the guide blade 5 are moved from the standby position shown by the two-dot chain line in FIG. Let's do it.

In FIG. 1, reference numeral 31 denotes a stopper attached to the rail 28, which hits the roller 30 toward the cutting position and prevents the blades 3, 5, etc. from moving beyond that position.

Next, the cutter pulley 2 is rotated together with the entire cutting parts 2-7, 20, 24, 25, 26.
The belt 21, which is input to 0, is designed in the following manner so that it is tensioned in the cutting position and takes part in the transmission, and conversely in the standby position it is automatically loosened and stops the transmission. There is.

That is, in FIG. 4, contrary to the case of FIG. 1, each part in the cutting action position is drawn with a solid line or a two-dot chain line, and each part in the standby position is drawn with a one-dot chain line. A rotating arm 32 is loosely fitted onto the pulley shaft 19a of the driving pulley 19, and a tension roller 33 is pivotally supported at the tip of the rotating arm 32, and is stretched between the machine frame 34 and the rotating arm 32. The rotating arm 32 is rotated by the spring 35.
The tension roller 33 is urged to rotate in the direction in which it comes into contact with the belt 21.

When the cutter pulley 20 is in the cutting position as shown by the solid line in FIG. When the belt 20 is moved to the standby position shown by the dashed-dotted line in FIG. -ing

Note that in this latter state, the tension roller 33 tightens the belt due to the loss of biasing force due to the shortening of the spring 35, or due to the restriction pin 36 on the rotation arm 32 hitting the rotation restriction surface 37a of the bearing body 37 of the pulley shaft 19a. 21 Displacement in the tension direction is prevented.

In FIG. 1, reference numeral 38 denotes a dropper that receives and releases straw from the straw removal chain 1 when the cutter is placed in the standby position. When a certain amount of straw is applied to the button, it rotates downward against the force of the spring 39 and releases the straw above it.

Further, in FIG. 2, reference numeral 40 denotes a compression spring disposed on one end of the rectangular mark portion 4a of the cutter shaft 4 so as to bias the outer shaft portion 4b in one direction, which cooperates with the nut 13B. The gap between the cutting blade 3 and the guide blade 5 can be easily adjusted by screwing the nut 13B.

The action of cutting the waste straw at the cutting action position of the illustrated disc cutter is similar to the action of conventional cutters of this type, but since the cutter according to this invention is configured as described above, it is particularly effective as follows: It has advantages such as.

That is, the waste straw cutting device for a combine harvester of this invention is provided with a rotatable arm 17 that is rotatably supported on the body of the combine about a horizontal support shaft 16 and is long in the left and right, up and down directions, and the entire cut part is cut by the rotary arm 17. The movable arm 17 rotatably supports the horizontal pin 18, and the left and right linear rails 28 support the entire cutting part and guide it between the cutting position and the standby position, as described above. A stopper is fixedly supported on the body of the combine and is tilted slightly downward in the direction from the standby position to the cutting position, and is provided at the downwardly inclined end of the rail 28 to stop the entire cut part from being received in the cutting position. 31.

Rotating arm 17 that supports the entire cutting part as described above.
is not fixed to the cutting part side, and the rotating arm 17 and the cutting part side are rotatably connected around the horizontal pin 181. Therefore, in the straw removal cutting device of this invention, the rotating arm 17 When rotating, the entire cutting part rotates relative to the horizontal pin 181 with respect to the rotating arm 17, and always moves along the rail 28, so that the rotating arm 17 rotates the cutting part. When displacing between the cutting action position and the standby position, the cutting part undergoes sliding displacement along the rail 28, and the entire cutting part is displaced between the cutting action position and the standby position by sliding displacement. It becomes.

Therefore, in the waste straw cutting device of this invention, the cutting parts as a whole are displaced between the cutting action position and the standby position,
Since the relative positions of the cutting parts that cooperate with each other to cut waste straw do not always change, it is possible to reliably cut waste straw over a long period of time, and the entire cutting part is not displaced in a straight line. Since it is displaced along a trajectory, it is necessary to take into account interference with the waste straw chain, etc., as in the case of displacement along an arcuate displacement trajectory centered on the horizontal support shaft 16 or horizontal pin 18. Without,
As in the illustrated embodiment, the standby position of the entire cutting part is set below the waste straw chain 1 as shown by the solid line in FIG.
The entire cut part can be stored compactly without protruding to the rear of the machine as much as possible.

The waste straw cutting device devised by Tako a long time ago is designed to displace the entire cut part while being guided by the rail 28, so it is possible to stably displace the entire heavy cut part. In addition, since the entire cut part is supported by both the rotating arm 17 and the rail 28, there is no need to provide a robust rail mechanism unlike the case where the entire cut part is supported by the rail mechanism alone. It has become.

Furthermore, the linear rail 28 is tilted slightly downward in the direction of the cutting action position of the cutting mechanism, and a stopper 31 is provided to stop the cutting mechanism at the cutting action position, so that the cutting mechanism is ejected at the cutting action position. When cutting the straw, the cutting mechanism 75 is reliably held at the cutting action position and is not displaced by vibration of the machine body, so that the problem of insufficient cutting of the waste straw does not occur.

Note that switching between the cutting and non-cutting states of the waste straw can also be performed by remote control of the rotary arm 17 from the combine operator's seat using an operating cable, and it is not necessary to hold the cutting mechanism in the standby position. Considering that the inclination angle of the rail 28 is small, it may be due to the tension of the operating cable as described above.
Alternatively, as in the illustrated embodiment, the rotary arm 17 is provided so that the arm 17 passes over the support shaft 16 position by an appropriate rotation angle in the direction of the standby position at the standby position of the cutting mechanism, and the same rotation is performed. This can be done by preventing the cutting mechanism from moving in the downward direction on the rail 28 by the arm 17.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of an embodiment of this invention, Fig. 2 is a partially cutaway sectional view of the same embodiment, and Fig. 3 is a partially cutaway sectional view of only the essential parts of the same embodiment. , FIG. 4 is a side view of the same embodiment, showing only the main parts. 2... Cutter shaft, 3... Cutting blade, 4... Cutter shaft, 5... Guide blade, 6, 1... Ball bearing, 8... Bearing metal, 14... Connection frame , 16...Horizontal support shaft, 17...Rotating arm, 18...Horizontal pin, 2
0...Cutter pulley, 24.25...Gear, 2
6... Gear case, 2γ... Cutter case, 28
...Rail, 30...Roller, 31...Stopper.

Claims (1)

[Scope of utility model registration request] A long rotating arm 17 is provided on the left and right, up and down, which is rotatably supported around a horizontal support shaft 161 on the body of the combine, and the entire cutting part can be rotated by a horizontal pin 181 on the rotating arm 17. At the same time, the right and left linear rails 28, which support the entire part to be cut and guide it between the cutting position and the standby position, are moved slightly downward in the direction from the standby position to the cutting position. A straw removal straw for a combine harvester, which is tilted and fixedly supported on the body of the combine; a stopper 31 is provided at the downwardly inclined end of the rail 28 to receive the entire cut part at the cutting operation position. Cutting device.